+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   15238 Hisaohori (1989 CQ) Classification: Main-belt Asteroid          SPK-ID: 2015238 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] [ show orbit diagram ] Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB Reference: JPL 26 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .07650197935476181 4.1641e-08   a 2.283585664443184 6.4936e-09 au q 2.108886841087121 9.5777e-08 au i 3.882327334969792 3.6509e-06 deg node 43.68859557546426 5.7743e-05 deg peri 137.4034277988041 6.1388e-05 deg M 31.76019045895498 2.0851e-05 deg tp 2459089.299949051877 (2020-Aug-27.79994905) 7.2946e-05 TDB period 1260.446419333014 3.45 5.3763e-06 1.472e-08 d yr n .2856130926933808 1.2183e-09 deg/d Q 2.458284487799246 6.9904e-09 au   Orbit Determination Parameters    # obs. used (total)      1786      data-arc span      11450 days (31.35 yr)      first obs. used      1989-02-02      last obs. used      2020-06-09      planetary ephem.      DE441      SB-pert. ephem.      SB441-N16      condition code      0      norm. resid. RMS      .51847      source      ORB      producer      Otto Matic      solution date      2021-Apr-13 00:52:38   Additional Information  Earth MOID = 1.11226 au   Jupiter MOID = 2.49829 au   T_jup = 3.597  [ show covariance matrix ] [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] Physical Parameter Table Parameter Symbol Value Units Sigma Reference Notes absolute magnitude H 14.9   n/a MPO452386   diameter diameter 2.674 km 0.138 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   geometric albedo albedo 0.357   0.072 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   15238 Hisaohori           Discovered 1989 Feb. 2 by T. Seki at Geisei. Hisao Hori (b. 1968) was born in Niihama City, Ehime prefecture, He is an amateur astronomer and member of Shikoku Astronomical Society. He works for Anan Science Center and observes with its 1.13-meter reflector. NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character) Reference: 20101128/MPCPages.arc Last Updated: 2010-12-06 Alternate Designations  1989 CQ = 1998 XH64  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] 2021-Apr-22 04:12 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin